"Self-disciplined begins with the mastery of your thoughts. If you don't control what you think, you can't control what you do. Simply, self-discipline enables you to think first and act afterward."Napolean Hill
CBT helps me control what I think by changing my reaction to life as it comes. At one time my mind was more an enemy that a friend. My thought were more on the negativity side then. Today I tend to see things in a more positive light even when things go wrong.